Pre-acting fire extinguishing system applied to high and large space place

Abstract

The utility model provides a pre-acting fire extinguishing system applied to high and large space places, which comprises a water supply pipe network, a fire extinguishing system, a fire extinguishing system and a fire extinguishing system, the water supply pipe network comprises a water supply main pipe, one or more branch pipes and one or more branch pipes, and one end of each branch pipe is connected with the water supply main pipe; one ends of the one or more branch pipes are connected with the branch pipe, and a plurality of fire extinguishing devices are arranged at the other ends of the branch pipes; the plurality of fire extinguishing devices are spraying type automatic jet flow fire extinguishing devices and / or jet type automatic jet flow fire extinguishing devices; the system further comprises a pre-acting device, the pre-acting device comprises a pre-acting alarm valve set, an air compressor and a quick exhaust valve, the pre-acting alarm valve set is installed between the water supply main pipe and the branch pipe, the quick exhaust valve is connected with the end, away from the water supply main pipe, of the branch pipe, and the air compressor is connected with the branch pipe. The fire extinguishing system solves the problem that a traditional fire extinguishing system cannot be used in a high and large space where pipeline water leakage is strictly prohibited.

Description

Technical Field

[0001] The utility model relates to the technical field of fire-fighting water supply equipment, in particular to a pre-action fire-extinguishing system applied to large space places. Background Art

[0002] The traditional jet or spray type automatic jet fire extinguishing system is an automatic water sprinkler fire extinguishing system used in large spaces. However, a wet pipe is used in front of the automatic control valve. When in the quasi-working state, it is easy to cause the risk of water immersion loss due to pipe leakage or system malfunction. It cannot be used directly in large spaces where system mis-spraying and pipe leakage are strictly prohibited, such as large art gallery exhibition halls or tobacco warehouses. Utility Model Content

[0003] The utility model aims to provide a pre-action fire extinguishing system for use in large spaces, which is used in places with a net height of more than 12 meters, and at least solves the problem that traditional injection or spraying type automatic jet fire extinguishing systems cannot meet the requirements of large spaces where pipe leakage is strictly prohibited.

[0004] The utility model provides a pre-action fire extinguishing system applied to a large space, the system comprising:

[0005] A water supply network, the water supply network comprising a water supply main pipe, one or more branch pipes, and one or more branch pipes, one end of each branch pipe is connected to the water supply main pipe; one end of each branch pipe is connected to the branch pipe, and the other end of each branch pipe is provided with a plurality of fire extinguishing devices;

[0006] A plurality of the fire extinguishing devices are spray-type automatic jet fire extinguishing devices and / or injection-type automatic jet fire extinguishing devices;

[0007] The system also includes a pre-action device, which includes a pre-action alarm valve group, an air compressor, and a quick exhaust valve. The pre-action alarm valve group is installed between the water supply main and the branch pipe, the quick exhaust valve is connected to one end of the branch pipe away from the water supply main, and the air compressor is connected to the branch pipe.

[0008] Furthermore, the branch pipe between the first control valve and the second control valve is also provided with a water flow indicator.

[0009] Furthermore, the water supply network also includes a fire water tank and a fire water pool, and both ends of the water supply main are connected to the fire water tank and the fire water pool respectively.

[0010] Furthermore, a pressure relief pipeline is provided between the water supply main and the fire water tank, and a pressure relief valve is provided on the pressure relief pipeline.

[0011] Furthermore, the branch pipe is provided with a first control valve and a second control valve, the drain pipe is connected to the branch pipe located between the first control valve and the second control valve, and the drain pipe is provided with a drain valve.

[0012] Furthermore, the system also includes a control device, which is controllably connected to the first control valve and the second control valve.

[0013] Furthermore, the control device is controllably connected to the drain valve.

[0014] Furthermore, the system further comprises a detection device and a control module box, the control device is controllably connected to the control module box, and the control module box is controllably connected to the detection device and the second control valve.

[0015] Furthermore, the multiple fire extinguishing devices are injection-type automatic jet fire extinguishing devices.

[0016] Furthermore, the system includes a fire water pump, a fire water pump control cabinet, and a flow switch. The fire water pump control cabinet is respectively connected to the fire water pump and the flow switch control. The flow switch is arranged at the water outlet of the fire water tank, and the fire water pump is arranged on the water supply main.

[0017] The utility model combines an automatic jet fire extinguishing system with a pre-action device. On the basis of realizing the automatic fire extinguishing function, the pre-action device is used to cooperate with an air compressor and a quick exhaust valve to drain the liquid from the branch pipe to form a dry pipeline, thereby reducing the load pressure of the pipeline itself caused by water filling, ensuring that there is no water in the pipeline, and when there is a small leak in the pipeline itself, it will not cause leakage. This provides a feasible automatic fire extinguishing method for large spaces where system accidental spraying and pipeline leakage are strictly prohibited, and has the advantages of greater safety and a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a pre-action spray type automatic jet fire extinguishing system according to an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the utility model pre-action jet type automatic jet fire extinguishing system applied to the atrium of the exhibition hall;

[0020] Figure 3 This is the control principle diagram of the pre-action injection type automatic jet fire extinguishing system of the utility model.

[0021] 1. Fire water tank; 2. Fire water pump; 3. Fire water pump control cabinet; 4. Check valve; 5. Manual valve; 6. Water pump coupler; 7. Fire water tank; 8. Pressure relief valve; 9. Inspection valve; 10. Water flow indicator; 11. Control module box; 12. Second control valve; 13. Detection device; 14. Fire extinguishing device; 15. Simulated terminal water test device; 16. Control device; 17. Branch pipe; 18. Branch pipe; 19. Interlocking controller; 20. Drain valve; 21. Quick exhaust valve; 22. Pre-action alarm valve group; 23. Flow switch; 24. Control panel; 25. Air compressor. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0024] Embodiment 1, the present utility model embodiment discloses a pre-action fire extinguishing system applied to a large space, the system comprising:

[0025] A water supply network, the water supply network comprising a water supply main, one or more branch pipes 17, and one or more branch pipes 18, one end of the branch pipe 17 is connected to the water supply main; one end of one or more branch pipes 18 is connected to the branch pipe 17, and the other end of the branch pipe 18 is provided with a plurality of fire extinguishing devices 14;

[0026] The plurality of fire extinguishing devices 14 are spray-type automatic jet fire extinguishing devices and / or injection-type automatic jet fire extinguishing devices;

[0027] The system also includes a pre-action device, which includes a pre-action alarm valve group 22, an air compressor 25, and a quick exhaust valve 21. The pre-action alarm valve group 22 is installed between the water supply main and the branch pipe 17, the quick exhaust valve 21 is connected to one end of the branch pipe 17 away from the water supply main, and the air compressor 25 is connected to the branch pipe 17.

[0028] The pre-action device also includes a control panel 24 and pipe accessories. The pre-action device is opened by electric, pneumatic, mechanical or other methods to allow water to flow into the sprinkler system in one direction and to generate an alarm.

[0029] The air compressor 25 is used to inflate the pipeline network behind the pre-action alarm valve group 22. According to needs, when in use, the air compressor 25 can be started when the system pressure drops to 0.03MPa, the air compressor 25 can be stopped when the system pressure rises to 0.05MPa, and an alarm can be sounded when the system pressure drops to 0.02MPa.

[0030] The quick exhaust valve 21 is arranged at the end of the horizontal pipe network. When the pre-action alarm valve group 22 is actuated, it serves as a device for quickly removing gas from the pipe to improve the efficiency of the water transport equipment and protect the pipe from deformation and rupture.

[0031] The embodiment of the utility model adds a pre-action alarm valve group 22 to the water supply main, and the pipe network behind it is usually filled with pressurized gas; a quick exhaust valve 21 is added at the end of the horizontal pipe network in each partition. When a fire occurs, before the fire extinguishing device 14 is activated, the pre-action alarm valve group 22 and the quick exhaust valve 21 are opened to extend the buffer time. Once it is found that the detection device 13 is malfunctioning, the water outlet valve of the fire pump 2 and the quick exhaust valve 21 can be manually closed during the process of exhausting gas from the pipeline and starting the fire pump 2 to fill water, effectively preventing the occurrence of erroneous spraying and improving the safety of the system.

[0032] However, in the existing automatic jet fire extinguishing system, after the detection component detects the alarm signal, the corresponding fire pump is immediately started automatically by the fire extinguishing device controller or directly started by the staff with management authority, and there is no buffer time to correct the wrong start.

[0033] The existing automatic jet fire extinguishing device system may cause leakage due to pipe corrosion, loose joints, etc. due to long-term water filling in the pipes. It is not suitable for buildings with high requirements for water damage prevention. In addition, water filling in the pipes is prone to freezing and pipe blockage. Therefore, additional measures need to be taken to protect the system in cold areas, which increases the construction cost.

[0034] The embodiment of the utility model combines a spraying and / or jetting automatic jet fire extinguishing device with a pre-action device. In the quasi-working state, the pipe network behind the pre-action alarm valve group 22 is a dry pipe network, which can be applied to cold areas and buildings where water damage is not allowed. On the basis of realizing the automatic fire extinguishing function, the safety and reliability of the system are improved, and a dual protection effect is played on the protected object. It provides a feasible automatic fire extinguishing method for large spaces where accidental spraying and water filling are strictly prohibited. The system has the advantages of stronger safety and wider application range.

[0035] Optionally, a water flow indicator 10 is further provided on the branch pipe 18 between the first control valve and the second control valve 12 .

[0036] Optionally, the water supply network further includes a fire water tank 7 and a fire water pool 1, and both ends of the water supply main are connected to the fire water tank 7 and the fire water pool 1 respectively.

[0037] Among them, Figure 1 As shown, one end of the water supply main connected to the fire water tank 1 is connected in sequence to a fire water pump 2, a check valve 4, and a water pump connector 6. The fire water pump 2 is connected to a fire water pump control cabinet 3 for control signals. A flow switch 23 is installed between the water supply main and the fire water tank 7. The fire water tank 7 is a high-level fire water tank.

[0038] Optionally, a pressure relief pipeline is provided between the water supply main and the fire water tank 1, and a pressure relief valve 8 is provided on the pressure relief pipeline.

[0039] Optionally, the branch pipe 18 is provided with a first control valve and a second control valve 12 , the drain pipe is connected to the branch pipe 18 located between the first control valve and the second control valve 12 , and the drain pipe is provided with a drain valve 20 .

[0040] When water exists in the branch pipe 17, the first control valve and the drain valve 20 can be opened, the second control valve 12 can be closed, the air compressor 25 can be turned on, and the quick exhaust valve 21 can be closed to discharge the water in the branch pipe 18 from the drain valve 20 by using gas, so that a dry pipe is formed in the branch pipe 18. The branch pipe 17 is also equipped with a maintenance valve 9 (signal valve) in sequence.

[0041] The drain valve 20 of the embodiment of the utility model is combined with the air compressor 25 to drain the water in the branch pipe 18, ensuring that the branch pipe 18 is also in a dry state.

[0042] Particularly, the system further comprises a control device 16 , and the control device 16 is control-connected to the first control valve and the second control valve 12 .

[0043] Particularly, the control device 16 is controllably connected to the drain valve 20 .

[0044] Particularly, the system further comprises a detection device 13 and a control module box 11 , the control device 16 is control-connected to the control module box 11 , and the control module box 11 is control-connected to the detection device 13 , the first control valve, and the second control valve 12 .

[0045] Among them, the first control valve and the second control valve 12 are solenoid valves or electric valves, and the control device 16 is a control host or a field control box; the control device 16 is also connected to a linkage controller 19 or an automatic alarm system host and a simulated terminal water testing device 15.

[0046] Optionally, the multiple fire extinguishing devices 14 are injection-type automatic jet fire extinguishing devices.

[0047] Among them, the differences between the jet-type automatic jet fire extinguishing device and the spray-type automatic jet fire extinguishing device are shown in the following table.

[0048]

[0049] Therefore, it can be seen that the jet-type automatic jet fire extinguishing device has the advantage of a large protection radius. The embodiment of the utility model can adapt to the environment of tall and large space buildings and achieve an effective fire extinguishing effect by adopting the jet-type automatic jet fire extinguishing device.

[0050] In particular, the system includes a fire water pump 2, a fire water pump control cabinet 3, and a flow switch 23. The fire water pump control cabinet 3 is respectively connected to the fire water pump 2 and the flow switch 23. The flow switch 23 is arranged at the water outlet of the fire water tank, and the fire water pump 2 is arranged on the water supply main.

[0051] Embodiment 2, as Figure 2 As shown, Example 1 is applied to a large-space exhibition hall, where the clearance height exceeds 16 meters. The exhibition hall adopts a lighting glass ceiling. In consideration of the decoration effect, pipelines and fire-fighting facilities shall not be set on the ceiling. The pre-action device and the air compressor 25 are installed outside the exhibition hall; the spray-type or injection-type automatic jet fire extinguishing device is installed on the frame column of the exhibition hall.

[0052] The working principle of the embodiment of the utility model is as follows Figure 3 shown.

[0053] Automatic fire extinguishing method: When a fire occurs, the detection device 13 sends out a fire alarm signal. After receiving the alarm signal, the fire alarm controller sends a command to open the pre-action alarm valve group 22 on the water supply main, and at the same time open the quick exhaust valve 21 to discharge the gas in the corresponding branch pipe, and automatically start the corresponding fire water pump 2 to fill the pipe network behind the pre-action alarm valve group 22 with water, and at the same time shut down the air compressor 25. After detecting the fire source, the detection device that finds the fire source opens the corresponding automatic control valve, and the corresponding fire extinguishing device 4 automatically opens to extinguish the fire.

[0054] Manual fire extinguishing method:

[0055] When a fire occurs, the automatic fire alarm system sends out a fire alarm signal, and the staff with management authority opens the system pre-action alarm valve group 22 and the quick exhaust valve 21, and directly starts the corresponding fire water pump 2 to fill the pipe network with water. At the same time, the corresponding automatic control valve can be opened through the fire extinguishing device controller, and the corresponding fire extinguishing device 4 is automatically opened to extinguish the fire, achieving a delayed water spraying effect, and meeting the requirement of strictly prohibiting accidental spraying when in the quasi-working state.

[0056] Article 5.0.10 and Article 5.0.11 of the "Design Specification for Automatic Sprinkler Fire Extinguishing Systems" GB 50084 stipulate that the parameters of the dry system and pre-action system refer to Table 5.0.1, but not Table 5.0.2. Therefore, the dry system and pre-action system are only applicable to places not exceeding 8m. The utility model combines the pre-action device with the automatic jet fire extinguishing device, which can be used in large spaces with a clearance height of more than 12 meters; avoiding water damage caused by mis-spraying.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that after reading the specification of this application, the technicians can still modify or replace the specific implementation mode of the utility model with equivalents, but these modifications or changes do not deviate from the scope of protection of the pending claims of the utility model application.

Claims

1. A pre-action fire extinguishing system used in large spaces, characterized in that: The system comprises: A water supply network, the water supply network comprising a water supply main pipe, one or more branch pipes, and one or more branch pipes, one end of each branch pipe is connected to the water supply main pipe; one end of each branch pipe is connected to the branch pipe, and the other end of each branch pipe is provided with a plurality of fire extinguishing devices; A plurality of the fire extinguishing devices are spray-type automatic jet fire extinguishing devices and / or injection-type automatic jet fire extinguishing devices; The system also includes a pre-action device, which includes a pre-action alarm valve group, an air compressor, and a quick exhaust valve. The pre-action alarm valve group is installed between the water supply main and the branch pipe, the quick exhaust valve is connected to one end of the branch pipe away from the water supply main, and the air compressor is connected to the branch pipe.

2. A pre-action fire extinguishing system for large spaces according to claim 1, characterized in that: A branch pipe between the first control valve and the second control valve is provided with a water flow indicator.

3. A pre-action fire extinguishing system for large spaces according to claim 1, characterized in that: The water supply network also includes a fire water tank and a fire water pool, and both ends of the water supply main are connected to the fire water tank and the fire water pool respectively.

4. A pre-action fire extinguishing system for large spaces according to claim 1, characterized in that: A pressure relief pipeline is also provided between the water supply main and the fire water tank, and a pressure relief valve is also provided on the pressure relief pipeline.

5. A pre-action fire extinguishing system for large spaces according to claim 1, characterized in that: The branch pipe is provided with a first control valve and a second control valve, the drain pipe is connected to the branch pipe located between the first control valve and the second control valve, and the drain pipe is provided with a drain valve.

6. A pre-action fire extinguishing system for large spaces according to claim 5, characterized in that: The system further comprises a control device, which is controllably connected to the first control valve and the second control valve.

7. A pre-action fire extinguishing system for large spaces according to claim 6, characterized in that: The control device is controllably connected to the drain valve.

8. A pre-action fire extinguishing system for large spaces according to claim 7, characterized in that: The system further comprises a detection device and a control module box. The control device is controllably connected to the control module box, and the control module box is controllably connected to the detection device and the second control valve.

9. A pre-action fire extinguishing system for large spaces according to claim 1, characterized in that: The multiple fire extinguishing devices are injection-type automatic jet fire extinguishing devices.

10. A pre-action fire extinguishing system for large spaces according to claim 3, characterized in that: The system includes a fire water pump, a fire water pump control cabinet, and a flow switch. The fire water pump control cabinet is respectively connected to the fire water pump and the flow switch. The flow switch is arranged at the water outlet of the fire water tank, and the fire water pump is arranged on the water supply main.

Images